Separable fastener



June 24,1930. F, s ARR 1,768,507

SEPARABLE FASTENER i I LY v by @2296 Patented June 24, 1930 UNITED STATES PATENT OFF-ICE.

FRED S. CARR, OF NEWTONgMASSACHUSETTS; MOSES F. CARR, EXECUTOR OF SAID FRED S. CARR, DECEASED, ASSIGNOR, BY MESNE ASSIGNMENTS, TO UNITED-CARR FASTENER CORPORATION, OF CAMBRIDGE, MASSACHUSETTS, A CORPORATION OF massacnusmrs SEPARAIBLE FASTENER Application filed February 12, 1927. Serial No. 167,676.

My invention aims to provide improvements in separable fasteners.

In the drawings, which illustrate a preferred embodiment of the invention Figure 1 is a plan View of a portion of a carpet, showing the underlying fastening means in dotted lines;

Fig. 2 is a section, taken on the line 2-2 of Fig. 1, showing the normal relation of the fastener parts when the socket is being engaged with the/stud;

Fig. 3. is a section taken on the same line as Fig. 2, showing the fastener parts after they have been fully engaged;

Fig. 4 is a section taken on the line H of Fig. 1; and

Fig. 5 includes a bottom, a side and a top elevation of the preferred form of socket.

Referring to the embodiment of the in ention illustrated by the drawings, I have shown a one-piece socket pressed from sheet metal in the form of an annulus having an outer peripheral wall 1, from which extend upwardly a plurality of attaching prongs 2. When the socket is used to securea carpet or rug to a floor, as illustrated by the drawings, the

prongs are pressed through the web 3, bent outwardly and downwardly over the. warp and weft threads of the web and concealed by the pile 4, as shown in Figs. 2 and 3..

The annulus is in part U-shaped in crosssection and is cut away, between the U-shaped portions, to provide only the laterally yleld able wall portions 5, as clearly. shown by Fig. 5. The U-shapled cross-sectional portions provide opposed neck-engaging aws 6, 6. The cut-out portions 7 between the edges of the jaws 6, 6 are so shaped that the dlstance between the outer ends of the jaws is less, cir-,

cumferentially, than the circumferential distance between the ends of the jaws where they join the wall 1, as clearly shown in Fig. 5. Thus the yieldable portions 5 of the wall 1 are somewhat increased to provide greater resiliency'to the socket. as a whole.

, The width of the outer end of each aw 6 is substantially less han half the circumference of the stud-receiving-aperture 8 (F g. 5), so that one of them may be engaged with the neck 9 of the stud, by tipping the socket relative-to the stud as illustrated in Fig. 2.

The jaw so engaged then acts as a fulcrum about which the socket may swing when being engaged with the stud or being disengaged therefrom. The result of engaging the fastener, as shown in Fig. 2, and then pressin it together, as shown in Fig. '3, as compared with engaging a socket with a s ud by direct axial movement of one toward the other, is the saving of one-half the strain on the wall 1. That is to say, where the stud and socket cannot be engaged except by axial movement, all of the stud-engaging portions must yield the maximum distance to permit engagement. In the construction shown and described, one aw may be engaged with the neck 9 ofthe stud prior to any yielding of the socket, so that there remains only one jaw to be pressed over the head 10. Thus the yielding portion or portions of the socket need yield only onehalf as much as would be necessary if this same socket were engaged with the stud by axial movement of one toward the other. Furthermore, the construction of the socket is such that in practice the socket will naturally tip and permit one jaw to engage the neck pf i336 stud before the other is pressed over the 'When engaging and disengaging the stud and socket, the wall 1 yields laterally to permit the stud-receiving aperture 8 to be enlarged through the lateral movement of the jaws 6, 6 so that the head of the stud may pass therebetween. I

The fastener shown and described is a decided improvement over other known types of fasteners because it is more durable, requires less movement of the yielding parts and may be engaged with and disengaged from a stud by a smoothly operating action without requiring a great deal of effort on the part of the operator. These improvements have been made without sacrificing in the least the advantages of the fastener, being. capable of withstanding lateral stresses without being general construction as shown in Figs. 2 and i 3 of thedrawings, especially when the socket is attached to a carpet or rug.

I do not wish to be limited to the particular embodiment of my invention illustrated and described.

1. A fastener socket comprising a casing having an upstanding laterally yleldable wall, a pair only of neck-engaging jaws extending inwardly from said wall, said neckengaging jaws being laterally yieldable with said wall and terminating at a stud-receiving aperture, means spacing said jaws a substantial distance apart circumferentially thereby to permit said socket to be engaged with a stud by first hooking one jaw into engagement with theneck of the stud and then pressing the otherjaw over the head to engage the neck, said first jaw acting as a fulcrum.

2. A fastener socket in the form of an annulus having thewall 1 provided with the latera-lly yieldable portions 5 to permit lateral yielding of the Wall, the jaws 6 adapted to move laterally with the wall 1 and the attaching prongs 2, said jaws being spaced apart substantial distances circumferentially by the cuts 7 to permit engagement of the socket with a stud by first engaging one jaw under the head 'of a stud and then tipping the socket into engagement with'the stud.

3. A fastener socket having a body portion provided with two opposed stud-engaging jaws at a stud-receiving aperture, each of said jaws extending substantially less than half the distance around the circumference of the studreceiving aperture thereby to permit engagement of the socket with a stud by tipping action whereby one of said jaws is initially hooked into engagement with the neck of a stud prior to complete engagement of the socket with the stud, laterally yieldable wall portions of substantial length connecting said jaws on the periphery of said body portion threby to permit lateral shifting movement of said jaws for enlargement of the stud-receiving aperture and a number of attaching prongs extending from said body portion for attachment of the socket to a support.

In testimony whereof, I have signed my name to this specification.

FRED S. CARR. 

